332000.pdf

FY12 Soo Locks Compressed Air System - Building Package FY12SOOCASBLDG

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 20 00

WATER WELLS

PART 1 GENERAL

1.1 UNIT PRICES

1.1.1 Water Well

1.2 REFERENCES

1.3 SYSTEM DESCRIPTION

1.3.1 Notification

1.3.2 Abandonment of Wells

1.4 SUBMITTALS

1.5 QUALITY ASSURANCE

1.5.1 Well Installation Plan

1.5.2 Qualifications

1.6 DELIVERY, STORAGE, AND HANDLING

1.7 SITE CONDITIONS

1.7.1 Facility Dig Permit

PART 2 PRODUCTS

2.1 CASING

2.1.1 Steel Casing and Couplings

2.2 WELL SCREENS

2.2.1 Metal Screen

2.3 CEMENT AND BENTONITE GROUT

2.3.1 Cement Grout

2.3.2 Bentonite Grout

2.4 PERMANENT PUMP

PART 3 EXECUTION

3.1 PROTECTION OF EXISTING CONDITIONS

3.2 WELL CONSTRUCTION

3.2.1 Setting Outer Casing

3.2.2 Construction of Inner Casing and Screen

3.2.3 Bentonite Seal

3.2.4 Grout Placement

3.3 WELL DEVELOPMENT

3.3.1 Well Development Criteria

3.4 TESTS

3.4.1 Capacity Test

3.4.2 Test for Plumbness and Alignment

3.4.3 Test for Quality of Water

3.4.4 Sand Test

3.5 INSTALLATION OF PERMANENT PUMP

3.6 SLAB

3.7 SITE CLEAN-UP

3.8 DRILLING WASTE DISPOSAL

SECTION 33 20 00 Page 1

3.9 WELL DECOMMISSIONING/ABANDONMENT

3.10 DOCUMENTATION AND QUALITY CONTROL REPORTS

3.10.1 Borehole Logs

3.10.2 Installation Diagrams

3.10.3 Well Development Records

3.10.4 Well Decommissioning/Abandonment Records

-- End of Section Table of Contents --

SECTION 33 20 00 Page 2

SECTION 33 20 00

WATER WELLS

PART 1 GENERAL

1.1 UNIT PRICES

Payment for each specified item will be made at the contract lump sum price for that item. Payment will include full compensation for equipment, materials and labor for drilling; removal and disposal of temporary casing, cuttings, and drill fluid; preparation of borehole logs; and sample handling, containers, storage, and testing. Depth, logging, installation, casing, riser pipe, and well screen shall be measured by linear distance. Payment will not be allowed for test holes or wells abandoned due to construction practices not in accordance with this specification, faulty construction practices or for the convenience of the Contractor.

1.1.1 Water Well

Compensation for the water well will be made at the contract lump sum price and will include material, equipment, and labor required to drill, develop, perform tests, and complete the permanent well. Depth shall be measured as the total linear distance between ground surface and bottom of hole.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA 10084 (2005) Standard Methods for the Examination of Water and Wastewater

AWWA A100 (2006; Errata 2007) Water Wells

AWWA C206 (2011) Field Welding of Steel Water Pipe

ASTM INTERNATIONAL (ASTM)

ASTM A53/A53M (2010) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM C150/C150M (2011) Standard Specification for Portland Cement

ASTM D2488 (2009a) Description and Identification of Soils (Visual-Manual Procedure)

ASTM D4750 (1987; R 2001) Determining Subsurface Liquid Levels in a Borehole or Monitoring Well (Observation Well)

SECTION 33 20 00 Page 3

ASTM D5521 (2005) Standard Guide for Development of Ground-Water Monitoring Wells in Granular Aquifers

U.S. ARMY CORPS OF ENGINEERS (USACE)

CED TR GL-85-3 (1985) Geotechnical Descriptions of Rock and Rock Masses

1.3 SYSTEM DESCRIPTION

The well shall be located as shown, with final location coordinated with the Contracting Officer's Representative and be constructed in accordance with these specifications. Each well shall be installed to prevent aquifer contamination by the drilling operation and equipment, intra- and inter-aquifer contamination, and vertical seepage of surface water adjacent to the well into the subsurface, especially the well intake zone.

1.3.1 Notification

The Contracting Officer shall be notified 7 days prior to drilling. The Contractor shall be responsible for contacting the State of Michigan in accordance with applicable reporting requirements. Before beginning work, the local health department shall be notified of the type and location of wells to be constructed, the method of construction and anticipated schedule for construction of the wells.

1.3.2 Abandonment of Wells

If the Contractor fails to construct a well of the required capacity, or if the well is abandoned because of loss of tools, or for any other cause, abandon the hole as specified in paragraph WELL DECOMMISSIONING/ABANDONMENT.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Installation Diagrams; G-AOF.

SD-03 Product Data

Well Installation Plan; G-AOF.

Well Material Qualifications Site Conditions

SD-06 Test Reports

Survey Maps and Notes Well Development Records Geophysical Logs Decommissioning/Abandonment Record Project Photographs

SECTION 33 20 00 Page 4

Water Source Filter Pack Tests.

SD-07 Certificates

Casing Cement and Bentonite Grout Drilling mud Well Screens Water removed Graveling equipment list Construction of Filter Pack

1.5 QUALITY ASSURANCE

1.5.1 Well Installation Plan

Submit a plan as specified herein describing the drilling methods, sampling, and well construction and well development 30 calendar days prior to beginning drilling operations. Mobilization activities may start prior to submittal of the plan. The plan shall be approved and signed by an experienced geologist or geotechnical engineer as specified in paragraph

1.5.2 QUALIFICATIONS. Incorporate the following requirements into the Contractor's Well Installation Plan and follow them in the field. The plan shall include, but shall not be limited to, a discussion of the following:

a. a. Description of well drilling methods, and installation procedures, including any temporary casing used, placement of filter pack and seal materials, drill cuttings and fluids disposal, and soil/rock sample disposition.

b. b. Description of well construction materials, including well screen, riser pipe, centralizers, tailpiece (if used), filter pack and filter pack gradation, bentonite or drilling mud, drilling fluid additives (if used), drilling water, cement, and well protective measures.

c. c. Description of quality control procedures to be used for placement of filter pack and seals in the boring, including depth measurements.

d. d. Forms to be used for written boring logs, installation diagrams of wells, geophysical logs, well development records, well sampling data records, state well registration forms, and well abandonment records.

e. e. Description of protective cover surface completion procedures, including any special design criteria/features relating to frost heave prevention. The maximum frost penetration for the site shall be included in this description.

f. Description of well development methods to be used.

g. List of applicable publications, including state and local regulations and standards.

h. List of personnel assignments for this project, and personnel qualifications.

i. Description of well decommissioning/abandonment procedures.

SECTION 33 20 00 Page 5

j. Description of well capacity testing techniques.

k. Description and discussion of geophysical techniques to be employed at the site.

l. Description of permanent pump to be installed, and discussion of pump operating tests to be employed at the site.

m. Description of specific methods to be employed to control potential contamination or pollution arising from well installation activities.

1.5.2 Qualifications

Submit personnel qualification documentation. The driller shall be licensed in the state of Michigan, according to the state requirements.

Document a minimum of 10 years of well installation experience. The Well Installation Plan shall be approved by either an "experienced" geologist that is licensed or a geotechnical engineer that is licensed in the state of Michigan.

1.6 DELIVERY, STORAGE, AND HANDLING

Store and maintain well materials in a clean, uncontaminated condition throughout the course of the project. Filter pack material shall not be allowed to freeze before installation.

1.7 SITE CONDITIONS

Access to each well site, including any utility clearance, permits, licenses, or other requirements and the payment thereof necessary for execution of the work, is the responsibility of the Contractor. A copy of all permits, licenses, or other legal requirements necessary for execution of the work shall be furnished 7 working days before commencement of the work. Visit each proposed well location to observe any condition that may hamper transporting equipment or personnel to the site. If clearing or relocation is necessary, the Contractor, and the Contracting Officer shall agree on a suitable clearing, or relocation plan, and the location of any required access road.

1.7.1 Facility Dig Permit

The contractor shall be responsible for completing the facility dig permit 7 days before commencement of the work.

PART 2 PRODUCTS

2.1 CASING

All casing, screen, and other well material shall be of compatible materials to prevent galvanic reaction between components of the completed well. Submit catalog data, and name of supplier, for well screens (to include the screen slot size), casing, riser pipe, filter pack material, bentonite, cement, centralizers, surface protective covers, well vaults, locking caps, airline oil filters for pneumatic drilling, dedicated sampling equipment, pumps, and chemical specifications on drill lubricants, tracers, disinfecting agents, and drill fluid additives, if used. Catalog data shall include any information, written or otherwise, supplied by the manufacturers or suppliers of the above listed items.

SECTION 33 20 00 Page 6

2.1.1 Steel Casing and Couplings

Steel casing shall be new carbon steel, conforming to ASTM A139/A139M Grade B standard weight galvanized steel pipe, conforming to ASTM A53/A53M and shall be nominal 8 inch diameter, .Schedule 40. Joints shall be either threaded and coupled, or field welded in accordance with AWWA C206.

2.2 WELL SCREENS

Well Screens shall be a minimum of 8 inches nominal diameter, and shall be directly connected to the bottom of the inner casing by an approved method. The length of the screen shall be sufficient to provide an intake area capable of passing not less than the minimum required yield of the well, at an entrance velocity not exceeding 0.1 fps. The opening, or slot size of the screen, shall be determined by the Contractor, be compatible with the material surrounding the screen, and shall be submitted for approval as part of the well installation plan. The well screen shall be of sufficient size and design to hold back and support the in-situ material surrounding the screen. The screen and all accessories required for satisfactory operation shall be essentially standard products of manufacturers regularly engaged in the production of such equipment. Field constructed screen is not acceptable. "Blanks" in the well screen may be utilized in nonproductive zones, or where centering devices are needed in the screened area, and shall be considered "casing."

2.2.1 Metal Screen

Metal screen shall be of an approved wire-wound type and shall be type 304 stainless steel, conforming to the applicable requirements of AWWA A100. A wire-wound screen manufactured with supporting bars or core of material different from the wire will not be acceptable. Joints shall be made of threaded couplings of the same material as the screens or by brazing or welding in accordance with AWWA C206.

2.3 CEMENT AND BENTONITE GROUT

2.3.1 Cement Grout

Cement grout shall consist of Portland cement conforming to ASTM C150/C150M, Type I or II, sand and water. Cement grout shall be proportioned not to exceed 2 parts, by weight, of sand to 1 part of cement with not more than 6 gallons of water per 94 lb bag of Portland cement, with a mixture of such consistency that the well can be properly grouted. No more than 5 percent by weight of bentonite powder may be added to reduce shrinkage.

2.3.2 Bentonite Grout

High-solids bentonite grout shall be made from sodium bentonite powder and/or granules. Water from an approved source shall be mixed with these powders or granules to form a thick bentonite slurry. The slurry shall consist of a mixture of bentonite and the manufacturer's recommended volume of water to achieve an optimal seal. The slurry shall contain at least 20 percent solids by weight and have a density of 9.4 lb/gallon of water or greater.

2.4 PERMANENT PUMP

Permanent pump shall be an approved submersible type with a capacity sufficient to deliver 300 gpm. The pump shall be connected to the pump

SECTION 33 20 00 Page 7 controls by a three-wire drop line. Piping for the well drop line shall be galvanized steel pipe conforming to ASTM A53/A53M. The pump shall operate on 480 volts, 60 Hz, 3-phase power, and the motor shall be of sufficient size to operate the pump under the maximum operating conditions without exceeding its rating. The pump and motor unit shall be no larger than 7 inches in diameter at any point.

PART 3 EXECUTION

3.1 PROTECTION OF EXISTING CONDITIONS

Maintain existing survey monuments and wells, and protect them from damage from equipment and vehicular traffic. Repair any items damaged during this work. Reinstall wells requiring replacement due to Contractor negligence according to these specifications. Wells scheduled for abandonment shall be protected from damage so that abandonment may be performed according to these specifications. Prior to excavation, obtain written approval from the local utility companies to drill at each site, to avoid disturbing buried utilities.

3.2 WELL CONSTRUCTION

The drilling method shall be as approved by the Contracting Officer and shall conform to all state and local standards for water well construction. The execution of the work shall be by competent workmen and shall be performed under the direct supervision of an experienced well driller. The drilling method shall prevent the collapse of formation material against the well screen and casing during installation of the well. The inside diameter of any temporary casing used shall be sufficient to allow accurate placement of the screen, riser, centralizer(s), filter pack, seal and grout. Casing pipe, well screens, and joint couplings shall be of compatible materials throughout each well. The well shall be a naturally developed well activated in the stratum based on test hole data.

The well shall be drilled straight, plumb, and circular from top to bottom. The well shall be initially drilled from the ground surface to the uppermost level of the water bearing strata and the bottom of the outer casing set at this elevation. The hole below the outer casing shall penetrate the water bearing stratum a sufficient depth to produce the required amount of water without causing excessive velocities through the aquifer. During construction of the wells, precautions shall be used to prevent tampering with the well or entrance of foreign material. Runoff shall be prevented from entering the well during construction. If there is an interruption in work, such as overnight shutdown or inclement weather, the well opening shall be closed with a watertight uncontaminated cover.

The cover shall be secured in place or weighted down so that it cannot be removed except with the aid of the drilling equipment or through the use of drill tools.

3.2.1 Setting Outer Casing

The outer casing shall not be less than 8 inches in diameter. The hole shall be of sufficient size to leave a concentric annular space of not less than 2-1/2 inches and not more than 6 inches between the outside of the outer casing and the walls of the hole. The annular space between the outer casing and the walls of the holes shall be filled with cement grout.

Acceptable methods of grouting are detailed in AWWA A100; the approved method shall specify the forcing of grout from the bottom of the space to

SECTION 33 20 00 Page 8 be grouted towards the surface. A suitable grout retainer, packer, or plug shall be provided at the bottom of the inner casing so that grout will not leak into the bottom of the well. Grouting shall be done continuously to ensure that the entire annular space is filled in one operation. After grouting is completed, drilling operations shall not be resumed for at least 72 hours to allow proper setting of the grout.

3.2.2 Construction of Inner Casing and Screen

After the grout has set, the hole below the outer casing shall be reamed at the required diameter, to the required depth, by an approved method which will prevent caving of the hole before or during installation of the filter pack, well screen and inner casing. In lieu of reaming, the entire well may be drilled to the diameter of the filter pack with an annular space between the inner casing and outer casing equal to the thickness of the filter pack. The outer casing shall be increased in size to provide for this space, if this option is elected. The well screen and inner casing shall be firmly attached, and lowered into the hole by a method which will allow for control of the rate of fall of the well screen and inner casing at all times. Well screen and inner casing shall not be dropped or allowed to fall uncontrolled into the hole. The inner casing shall extend up through the outer casing to 3 feet below the ground surface. Approved centering devices shall be installed at a spacing of 120 degrees, between the outer casing and inner casing prior to well construction at intervals not exceeding 25 feet along the length. If the screen length is greater than 25 feet, a 3 foot length of blank casing shall be placed in the middle of the screen interval for placement of centering devices. Centering devices shall not be placed on the screened interval, or within the bentonite seal, if used.

3.2.3 Bentonite Seal

After the inner casing and well screen have been installed, the annular space between the inner and outer casings shall be sealed by use of a bentonite seal. A minimum 3 foot thick hydrated bentonite seal shall be placed on top of the filter pack in a manner which prevents bridging of the bentonite in the annulus. The bottom of the bentonite seal shall be a minimum of 5 feet above the top of the well screen. The depth to the top of the bentonite seal shall be directly measured, and recorded immediately after placement, without allowance for swelling. If the bentonite seal is located above any borehole fluid levels, a 1 foot layer of fine sand shall be placed at the top of the bentonite seal.

3.2.4 Grout Placement

After the inner casing and well screen have been installed, a non-shrinking cement grout, shall be mechanically mixed in accordance with paragraph CEMENT AND BENTONITE GROUT, and placed by tremie pipe, in one continuous operation into the annulus between the inner and outer casings above the bentonite seal to the ground surface. Grout injection shall be in accordance with AWWA A100. If the casing interval to be grouted is less than 15 feet, and without fluids after any drill casing is removed, the grout may be placed either by pouring or pumping. The tremie pipe shall be thoroughly cleaned with high pressure water before use in each well. The bottom of the tremie pipe shall be constructed to direct the discharge to the sides rather than downward. The discharge end of the tremie pipe shall be submerged at all times. Additional grout shall be added from the surface to maintain the level of the grout at the land surface as settlement occurs. Work shall not be conducted in the well within 24 hours

SECTION 33 20 00 Page 9 after cement grouting. The alignment of the well shall be verified by passing a 5 foot long section of rigid steel pipe 1/4 inch smaller in diameter than the inside diameter of the casing through the entire well.

If the pipe does not pass freely, the well will not be accepted. The pipe section shall be thoroughly cleaned with high pressure hot water prior to each test.

3.3 WELL DEVELOPMENT

Within 7 days of completion of each well, but no sooner than 48 hours after cement grouting is completed, the well shall be developed. The well shall be developed in accordance with the Well Installation Plan, by approved methods until the water pumped from the well is substantially free from sand, and until the turbidity is less than 5 on the Jackson Turbidity Scale specified in AWWA 10084. Developing equipment shall be of an approved type and of sufficient capacity to remove all cutting fluids, sand, rock cuttings, and any other foreign material. The well shall be thoroughly cleaned from top to bottom before beginning the well tests. Development shall be performed using only mechanical surging, over pumping, or jetting, or a combination thereof in accordance with ASTM D5521. Details of the proposed development method shall be included in the Well Installation Plan. At the time of development of any well, the well shall be free of drawdown or surcharge effects due to pump testing, developing or drilling at another location. The Contractor is responsible for maintaining at the well site the needed access and work area and clearance, necessary to accomplish development. Furnish, install, or construct the necessary discharge line and troughs to conduct and dispose of the discharge a sufficient distance from the work areas to prevent damage. Development shall be conducted to achieve a stable well of maximum efficiency and shall be continued until a satisfactory sand test, as specified in paragraph Sand Test, is obtained. During predevelopment of the well, filter pack material shall be added to the annular space around the screen to maintain the top elevation of the filter pack to the specified elevation. Provide an open tube or other approved means for accurately determining the water level in the well under all conditions. If, at any time during the development process it becomes apparent in the opinion of the Contracting Officer that the well may be damaged, development operations shall be immediately terminated. The Contracting Officer may require a change in method if the method selected does not accomplish the desired results. The Contracting Officer may order that wells which continue to produce excessive amounts of fines after development for 6 hours be abandoned, plugged, and backfilled, and may require the Contractor to construct new wells nearby. All materials pulled into the well by the development process shall be removed prior to performing the pumping test.

3.3.1 Well Development Criteria

A well development record shall be maintained in accordance with paragraph Well Development Records. Development is complete when all of the following criteria are met:

a. Well water is clear to the unaided eye,

b. Sediment thickness in the well is less than 1 percent of the screen length,

c. A minimum of three times the standing water volume in the well is removed plus three times the volume of all added water and drilling fluid lost during drilling and installation of the well is removed.

SECTION 33 20 00 Page 10

3.4 TESTS

After the wells have been developed, notify the Government and make the necessary arrangements for conducting the capacity tests. If the capacity test indicates that the required capacity can be obtained, the tests for quality of water shall be made. If the capacity and quality tests indicate that the required capacity and quality can be obtained, the permanent well, as specified, shall be completed at that depth. Submit Test Reports within 24 hours following the conclusion of each test. Prior to making quality tests, drilling equipment, tools and pumps contacting well water shall be cleaned.

3.4.1 Capacity Test

Furnish and install an approved pump, with discharge piping of sufficient size and length to conduct the water being pumped to point of discharge, and equipment necessary for measuring the rate of flow and water level in the well. An 8 hour constant-rate capacity test shall be run with the pumping rate and drawdown at the pump well and observation wells recorded every 30 minutes. The test shall begin at the rate of 300 gpm and at least that rate maintained throughout the duration of the test. If this capacity cannot be maintained for the test period, the capacity test shall be terminated and the hole drilled deeper or relocated as directed by the Contracting Officer's Representative. When the pump is shut off, water level readings shall be taken during the rebound period for the same intervals of time as the drawdown test. Three copies of the test records shall be delivered to the Contracting Officer's Representative.

3.4.2 Test for Plumbness and Alignment

Upon completion of the permanent well, plumbness and alignment shall be tested by lowering into the well, to the total depth of the well, a plumb 20 feet long or a dummy of the same length. The outer diameter of the plumb shall not be more than1/2 inch smaller than the diameter of that part of the hole being tested. If a dummy is used, it shall consist of a rigid spindle with three rings, each ring being 12 inches wide. The rings shall be cylindrical and shall be spaced one at each end of the dummy and one in the center. The central member of the dummy shall be rigid so that it will maintain the alignment of the axis of the rings. If the plumb or dummy fail to move freely throughout the length of the casing or well screen for the depth of well or should the well vary from the vertical in excess of two-thirds the inside diameter of that part of the well being tested for each 100 feet of depth, the plumbness and alignment of the well shall be corrected. If the faulty alignment and plumbness is not correctable, as determined by the Contracting Officer, the well shall be abandoned as specified in paragraph WELL DECOMMISSIONING/ABANDONMENT and a new well drilled at no additional cost to the Government.

3.4.3 Test for Quality of Water

When the capacity test in the test hole has been completed, and again after the yield in the permanent well and drawdown test or capacity test have been completed, secure samples of the water in suitable containers, and of sufficient quantity, to have bacterial, physical, and chemical analyses made by a recognized testing laboratory, except that the bacterial analysis may be made by the applicable State Board of Health, if desired. Water

SECTION 33 20 00 Page 11

Quality Analysis shall address each item specified in the Water Quality Analysis Table at the end of this section. Expenses incident to these analyses shall be borne by the Contractor and the results of the analyses shall be furnished to the Contracting Officer. All sampling and analyses shall be performed using EPA and State approved methods, procedures, and holding times.

3.4.4 Sand Test

As part of each capacity test, or at the end of each intermittent pumping, a determination of the amount of sand (filter pack and/or foundation material) a well is producing shall be performed. Prior to starting the sand test all material shall be removed from the bottom of the tailpipe.

Test each well by pumping at a rate of 300 gpm. After the pump is at the desired pumping rate the flow from the discharge shall be diverted into a container that will collect all the sand being carried by the water.

Development of the well is satisfactory if the amount of sand collected is less than 1 pint per 25,000 gallons of water pumped at the specified rate.

Upon completion of the test the amount of sand in the tailpipe shall be determined to verify that no material is being deposited in the bottom of the well.

3.5 INSTALLATION OF PERMANENT PUMP

The permanent well pump shall be installed based upon the Contractors findings during the drawdown test. The pump shall be secured at the required elevation as recommended by the pump manufacturer. After installation of the pumping units and appurtenances is complete, operating tests shall be carried out to assure that the pumping installation operates properly. Tests shall assure that the pumping units and appurtenances have been installed correctly, that there is no objectionable heating, vibration, or noise from any parts, and that all manual and automatic controls function properly.

3.6 SLAB

A slab shall be constructed preventing the infiltration of surface water or precipitation into the well. The slab shall be 4 feet square by 6 inches thick and constructed of reinforced concrete. The top of the outer casing shall extend 24 inches above the top of the slab. The top of the slab shall be flush with existing grade.

3.7 SITE CLEAN-UP

After completion of the work, tools, appliances, surplus materials, temporary drainage, rubbish, and debris incidental to work shall be removed. Excavation and vehicular ruts shall be backfilled and dressed to conform with the existing landscape. Utilities, structures, roads, fences, or any other pre-existing item which must be repaired or replaced due to the Contractor's negligence shall be the Contractor's responsibility;

repair or replacement shall be accomplished prior to completion of this contract.

3.8 DRILLING WASTE DISPOSAL

Slurry, drill cuttings, rock core; other solid or liquid material bailed, pumped, or otherwise removed from the borehole during drilling, SECTION 33 20 00 Page 12 installation, completion, and well development procedures; and fluids from material/equipment decontamination activities shall be disposed of by Contractor.

3.9 WELL DECOMMISSIONING/ABANDONMENT

Any well disapproved by the Contracting Officer, or any well decommissioned/abandoned by the Contractor for any reason shall be decommissioned/abandoned according to the requirements of the State of Michigan and the requirements of these specifications. Well decommissioning/abandonment includes the removal of all materials left in the borehole/well, excluding the filter pack, and including backfill materials, casing, screen, and any other material placed into the hole before the decision was made to abandon the borehole/well. Test holes decommissioned/abandoned for any reason shall be grouted from the bottom to within 2 feet of the top of the ground surface according to the protocol for grout/bentonite placement established in paragraph Grout Placement, using the grout mix specified in paragraph CEMENT AND BENTONITE GROUT. The top 2 feet shall be backfilled with material appropriate for the intended land use. Maintain a well decommissioning/abandonment record as specified herein. Groundwater levels, if encountered before the decision is made for decommissioning/abandonment, shall be measured in all borings prior to backfilling. These water levels shall be included in the well decommissioning/abandonment records. No well shall be decommissioned/abandoned without the approval of the Contracting Officer.

3.10 DOCUMENTATION AND QUALITY CONTROL REPORTS

Establish and maintain documentation and quality control reports for well construction and development to record the desired information and to assure compliance with contract requirements, including, but not limited to, the following:

3.10.1 Borehole Logs

A borehole log shall be completed for each boring drilled. Borehole logs shall be prepared by the Contractor during all well drilling and installation activities. The log scale shall be 1 inch equals 1 foot.

Copies of complete well logs shall be kept current in the field at each well site and shall be available at all times for inspection by the Contracting Officer. Information provided on the logs shall include, but not be limited to, the following:

a. Name of the project and site.

b. Boring/well identification number.

c. Location of boring (coordinates, if available).

d. Make and manufacturer's model designation of drilling equipment and name of drilling firm.

e. Date boring was drilled.

f. Reference data for all depth measurements.

g. Name of driller and name and signature of geologist preparing log.

h. Nominal hole diameter and depth at which hole diameter changes.

SECTION 33 20 00 Page 13

i. Total depth of boring.

j. Method of drilling, including sampling methods and sample depths, including those attempted with no recovery. Indication of penetration resistance such as drive hammer blows given in blows per 6 inches of driven sample tubes. Information shall include hammer weight and drop distance. Information such as rod size, bit type, pump type, etc., shall be recorded. A description of any temporary casing used, drill fluids and fluid additives used, if any, including brand name and amount used, along with the reason for and start (by depth) of its use shall be included. If measured, mud viscosities and weight shall be recorded.

k. Depth of each change of stratum. If location of strata change is approximate, it shall be so stated.

l. l. Description of the material of which each stratum is composed, in accordance with ASTM D2488, and/or standard rock nomenclature in accordance with CED TR GL-85-3, as necessary. Soil parameters for logging shall include, but shall not be limited to, classification, depositional environment and formation, if known, Unified Soil Classification Symbol, secondary components and estimated percentages, color, plasticity, consistency (cohesive soil), density (non-cohesive soil), moisture content, structure and orientation, and grain angularity. Rock core parameters for logging shall include, but shall not be limited to, rock type, formation, modifier denoting variety (shaly, calcareous, siliceous, etc.), color, hardness, degree of cementation, texture, crystalline structure and orientation, degree of weathering, solution or void conditions, primary and secondary permeability, and lost core. The results of any chemical field screening shall also be included on the boring log. Classification shall be prepared in the field at the time of sampling. The results of visual observation of the material encountered, and any unusual odor detected shall also be duly noted and recorded.

m. Depth of any observed fractures, weathered zones, or any abnormalities encountered.

n. Depth and estimated percent of drill fluid loss or lost circulation.

Measures taken to regain drill water circulation. Significant color changes in the drilling fluid return.

o. Depth to water, and any non-aqueous phase liquids (NAPLs) and date measured before, during, and after each drilling shift, and prior to well installation. Provide and maintain at each well under construction a portable water level measuring device of sufficient length to measure the water level 40 foot depth. The device shall be available onsite at all times and measuring wire shall be graduated in

0.01 foot. The method of measuring the liquid level shall be noted on the boring log. Water level measurements shall be taken to the nearest

0.01 foot. It shall be noted on the boring log if the boring was purged and allowed to recover at intervals during the installation, or that water used in drilling was allowed to dissipate into the formation prior to measuring the water level.

p. Box or sample number. Depths and the number of the core boxes and/or samples shall be recorded at the proper interval.

SECTION 33 20 00 Page 14

q. Percent Rock Core Recovery. The percent core recovery for the individual drill runs, if rock is cored, shall be shown.

3.10.2 Installation Diagrams

The well will not be accepted before the geologic logs and installation diagrams are received. Submit As-built installation diagram for each well installed, prepared by the geologist present during well installation operations, within 7 working days of the completion of the well installation procedure. The diagram shall illustrate the as-built condition of the well and include, but not be limited to, the following items:

a. Name of the project and site.

b. Well identification number.

c. Name of driller and name and signature of the individual preparing diagram.

d. Date of well installation.

e. Description of material from which the well is constructed, including well casing/riser pipe and screen material, centralizer composition, if used, diameter and schedule of casing and screen, gradation of filter pack, lithologic description, brand name (if any), source, and processing method, and method of placement of the filter pack, bentonite seal type (pellets, granules, chips, or slurry), grout type (cement or high-solids bentonite) and type of protective cover (protective casing or flush-to-ground),if used.

f. Total depth of well.

g. Nominal hole diameter.

h. Depth to top and bottom of screen, and filter pack.

i. Depth to top and bottom of any seals installed in the well boring (grout or bentonite).

j. Type of cement and/or bentonite used, mix ratios of grout, method of placement and quantities used.

k. Elevations/depths/heights of key features of the well, such as top of well casing/riser pipe, top and bottom of protective casing (if used), ground surface, the depth of maximum frost penetration (frost line), bottom of well screen, top and bottom of filter pack, and top and bottom of seal.

l. Other pertinent construction details, such as slot size and percent open area of screen, type of screen, and manufacturer of screen. Well location by coordinates. A plan sheet shall also be included showing the coordinate system used and the location of each well. A plan sheet is not required for each well installation diagram; multiple wells may be shown on the same sheet.

m. Static water level upon completion of the well.

n. Special problems and their resolutions; e.g., grout in wells, lost

SECTION 33 20 00 Page 15 casing, or screens, bridging, etc.

o. Description of surface completion.

3.10.3 Well Development Records

A well development record shall be prepared for each well, within 7 working days of the completion of development under the supervision of the Contractor present during well installation operations. Information provided on the well development record shall include, but not be limited to, the following:

a. Date, time, and elevation of water level in the well, before development.

b. Depth to bottom of well, name of project and site, well identification number, and date of development.

c. Method used for development, to include size, type and make of equipment, bailer, and/or pump used during development.

d. Time spent developing the well by each method, to include typical pumping rate, if pump is used in development.

e. Volume and physical character of water removed, to include changes during development in clarity, color, particulates, and odor.

f. Volume of water added to the well, if any.

g. Volume and physical character of sediment removed, to include changes during development in color, and odor.

h. Source of any water added to the well.

i. Clarity of water before, during, and after development.

j. Total depth of well and the static water level as in accordance with ASTM D4750from top of the casing, immediately after pumping/development, and 24 hours after development.

k. Name and job title of individual developing well.

l. Name and/or description of the disposal facility/area, for the waters removed during development.

3.10.4 Well Decommissioning/Abandonment Records

Decommissioning/abandonment records shall include, as a minimum, the following:

a. Project name.

b. Well or test hole number.

c. Well/boring location, depth and diameter.

d. Date of decommissioning/abandonment.

e. Method of decommissioning/abandonment.

SECTION 33 20 00 Page 16

f. All materials used in the decommissioning/abandonment procedure and the interval in which test materials were placed.

g. Casing, and or other items left in hole by depth, description, and composition.

h. Description and total quantity of grout used initially.

i. Description and daily quantities of grout used to compensate for settlement.

j. Water or mud level (specify) prior to grouting and date measured.

k. The reason for decommissioning/abandonment of the well/test hole.

-- End of Section --

SECTION 33 20 00 Page 17

SUBMITTAL FORM,Jan 96 PREVIOUS EDITION IS OBSOLETE PAGE 1 OF 1 PAGES

FY12 Soo Locks Compressed Air System - Building Package

33 20 00 SD-02 Shop Drawings

3.10.2 G AOFInstallation Diagrams

SD-03 Product Data

1.5.1 G AOFWell Installation Plan

Well Material 1.5.2Qualifications 1.7Site Conditions

SD-06 Test Reports Survey Maps and Notes

3.10.3Well Development Records Geophysical Logs Decommissioning/Abandonment Record

Project Photographs Water Source Filter Pack

3.4Tests SD-07 Certificates

2.1Casing 2.3Cement and Bentonite Grout

Drilling mud 2.2Well Screens

Water removed Graveling equipment Construction of Filter Pack

SUBMITTAL REGISTER

CONTRACT NO.

TITLE AND LOCATION CONTRACTOR

CONTRACTOR:

SCHEDULE DATES

CONTRACTOR

ACTION

APPROVING AUTHORITY

A C T I V I T Y

N O

T R A N S M I T T A L

N O

S P E C

S E C T

DESCRIPTION

ITEM SUBMITTED

P A R A G R A P H

C L A S S I F I C A T I O N

G O V T

O R

A E

R E V W

R SUBMIT

APPROVAL

NEEDED

BY

MATERIAL

NEEDED

BY

A C T I O N

C O D E

DATE

OF

ACTION

DATE FWD

TO APPR

AUTH/

DATE RCD

FROM

CONTR

DATE FWD

TO OTHER

REVIEWER

DATE RCD

FROM OTH

REVIEWER

A C T I O N

C O D E

DATE

OF

ACTION

MAILED

TO

CONTR/

DATE RCD

FRM APPR

AUTH REMARKS

(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (l) (m) (n) (o) (p) (q) (r)

2.4 PERMANENT PUMP